Influence of nanoscale zero-valent iron on geochemical properties of groundwater and vinyl chloride degradation: A field case study

Wei, Yuting; Wu, Su-En; Chou, Cheng‐Yang; Che, Choi-Hong; Tsai, Shin-Mu; Lien, Hsing-Lung

doi:10.1016/j.watres.2009.09.012

Cited by 162 publications

(77 citation statements)

References 29 publications

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“…2a). ORP has a clear relationship with the redox processes in nZVI reaction system [7,38,54]. ORP mainly depends on the composition of the film formed on the electrode and is also partially influenced by the concentrations of dissolved Fe 2+ and H 2 .…”

Section: Mechanisms Of Formation and Transformation Of Pb-containing mentioning

confidence: 99%

“…Nanoscale zerovalent iron (nZVI) has been extensively considered for in situ groundwater remediation [7][8][9][10] of a wide range of groundwater pollutants including chlorinated solvents [11,12], chlorinated pesticides [13], heavy metals [14][15][16], and nitrate [17][18][19]. Pb 2+ is immobilized by nZVI mainly through sorption and coprecipitation and partly by reduction [15].…”

Section: Introductionmentioning

confidence: 99%

“…nitrate) is the amount of nZVI to be applied. Due to oxidation, nZVI may persist for less time when oxidants are abundant in the environment than when oxidants are limited [7,34,35]. If all nZVI is consumed by nitrate and/or other oxidants, previous adsorbed/co-precipitated Pb 2+ on the surface of nZVI will be likely released into solution again.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Effects of nitrate on the treatment of lead contaminated groundwater by nanoscale zerovalent iron

Adeleye

Zhou

et al. 2014

Journal of Hazardous Materials

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Section: Mechanisms Of Formation and Transformation Of Pb-containing mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effects of nitrate on the treatment of lead contaminated groundwater by nanoscale zerovalent iron

Adeleye

Zhou

et al. 2014

Journal of Hazardous Materials

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“…The remediation methods for decontamination of chlorinated ethenes on a field scale include soil vapor extraction (SVE), soil flushing, pumping-and-treatment, and injection of nanoscale zerovalent iron (nZVI) (Gordon, 1998;Mackay et al, 2000;Rivett et al, 2006;Wei et al, 2010;McCray et al, 2011). Long term monitoring data have been used to evaluate the occurrence of natural attenuation or the long *Corresponding author : kklee@snu.ac.kr Received : 2013.…”

Section: Introductionmentioning

confidence: 99%

Evidences of in Situ Remediation from Long Term Monitoring Data at a TCE-contaminated Site, Wonju, Korea

Lee¹,

Kim²,

Lee³

et al. 2013

Journal of Soil and Groundwater Environment

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The contamination of chlorinated ethenes at an industrial complex, Wonju, Korea, was examined based on sixteen rounds of groundwater quality data collected from 2009 to 2013. Remediation technologies such as soil vapor extraction, soil flushing, biostimulation, and pumping-and-treatment have been applied to eliminate the contaminant sources of trichloroethylene (TCE) and to prevent the migration of TCE plume from remediation target zones. At each remediation target zone, temporal monitoring data before and after the application of remediation techniques showed that the aqueous concentrations of TCE plume present at and around the main source areas decreased significantly as a result of remediation technologies. However, the TCE concentration of the plumes at the downstream area remained unchanged in response to the remediation action, but it showed a great fluctuation according to seasonal recharge variation during the monitoring period. Therefore, variations in the contaminant flux across three transects were analyzed. Prior to the remediation action, the concentration and mass discharges of TCE at the transects were affected by seasonal recharge variation and residual DNAPLs sources. After the remediation, the effect of remediation took place clearly at the transects. By tracing a time-series of plume evolution, a greater variation in the TCE concentrations was detected at the plumes near the source zones compared to the relatively stable plumes in the downstream. The difference in the temporal profiles of TCE concentrations between the plumes in the source zone and those in the downstream could have resulted from remedial actions taken at the source zones. This study demonstrates that long term monitoring data are useful in assessing the effectiveness of remediation practices.

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“…특히, 팔라듐, 니켈 등 을 이용한 반응성의 향상 (Johnson et al, 2009;Zhang et al, 2006)과 PAA(polyacrylic acid), CMC(carboxymethyl cellulose) 등의 고분자전해질 및 계면활성제 코팅 을 이용한 이동성의 증진에 관한 연구 (He et al, 2007;Jiemvarangkul et al, 2011;Klimkova et al, 2011;Saleh et al, 2008)가 최근 20년간 중점적으로 수행되었 다. 그 결과 표면개질을 통해 상업용 NZVI가 제조되었고 기술의 상용화가 이루어져 실제 오염현장의 복원에 다수 적용되고 있다 (Elliott and Zhang, 2001;Hara et al, 2006;Wei et al, 2010). 크게 증가하였다 (Fig.…”

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Field Study on Application of Reactive Zone Technology Using Zero-Valent Iron Nanoparticles for Remediation of TCE-Contaminated Groundwater

Ahn¹,

Kim²,

Hwang

et al. 2014

Journal of Soil and Groundwater Environment

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The laboratory and field studies were conducted to identify an optimal injection concentration of nanoscale zero-valent iron particles (NZVI) and to evaluate the applicability of NZVI-based reactive zone technology to the site contaminated with trichloroethylene (TCE) DNAPL (Dense Non-Aqueous Phase Liquid). The laboratory test found an optimal injection concentration of NZVI of 5 g/L that could remove more than 95% of 0.15 mM TCE within 20 days. Eleven test wells were installed at the aquifer that was mainly composed of alluvial and weathered soils at a strong oxic condition with dissolved oxygen concentration of 3.50 mg/L and oxidation-reduction potential of 301 mV. NZVI of total 30 kg were successfully injected using a centrifugal pump. After 60 days from the NZVI injection, 86.2% of the TCE initially present in the groundwater was removed and the mass of TCE removed was 405 g. Nonchlorinated products such as ethane and ethene were detected in the groundwater samples. Based on the increased chloride ion concentration at the site, the mass of TCE removed was estimated to be 1.52 kg. This implied the presence of DNAPL TCE which contributed to a higher estimate of TCE removal than that based on the TCE concentration change.

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Influence of nanoscale zero-valent iron on geochemical properties of groundwater and vinyl chloride degradation: A field case study

Cited by 162 publications

References 29 publications

Effects of nitrate on the treatment of lead contaminated groundwater by nanoscale zerovalent iron

Effects of nitrate on the treatment of lead contaminated groundwater by nanoscale zerovalent iron

Evidences of in Situ Remediation from Long Term Monitoring Data at a TCE-contaminated Site, Wonju, Korea

Field Study on Application of Reactive Zone Technology Using Zero-Valent Iron Nanoparticles for Remediation of TCE-Contaminated Groundwater

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